Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d994e7d0cd8a2ec…

MALICIOUS

PDF

73.2 KB Created: 2020-11-19 21:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c2c952fbca8cd5aae0a2a350d657e091 SHA-1: db0201cc3d67f2028d27050039d7ef0a90686c8b SHA-256: 3d994e7d0cd8a2ecb44f2326ba91b4fd47754d7ed7ca4e256a1a9f3d7c806e1b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?utm_term=cyberlink+youcam+crack+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8aeae5e715f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5faeffafc8771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8be770e773d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8b69e2c8f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f90e3da62048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f87bc9a826ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5fa77202df071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5fa860e6eb29a.pdfIn PDF document text
    • https://vagepawesiger.weebly.com/uploads/1/3/4/5/134516176/bamafamefebotizop.pdfIn PDF document text
    • https://dubuzimonovox.weebly.com/uploads/1/3/4/3/134347386/7314460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fafa38586864.pdfIn PDF document text
    • https://jaxirifaru.weebly.com/uploads/1/3/4/5/134500995/jubupuvukifozutof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_5fae54c2f01be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 5176 bytes
SHA-256: 6a395838238e24a22440c2b898dcfce0d752793cb358b9b5d7568d0e51b918ab
font_01_sfnt_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 5468 bytes
SHA-256: 9a457b7154110ef4ef4d230e2c461ae0afdc5438b72b7b49b61282324376012a
font_02_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10948 bytes
SHA-256: cd5a532be70dba9fe3517843af3fe79242fb009e91371a186160b349d0ef17e0

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